JP2000514909A - Hydraulic hoist distributor with controllable position and applied force for tractors and agricultural machinery - Google Patents

Hydraulic hoist distributor with controllable position and applied force for tractors and agricultural machinery

Info

Publication number
JP2000514909A
JP2000514909A JP54876798A JP54876798A JP2000514909A JP 2000514909 A JP2000514909 A JP 2000514909A JP 54876798 A JP54876798 A JP 54876798A JP 54876798 A JP54876798 A JP 54876798A JP 2000514909 A JP2000514909 A JP 2000514909A
Authority
JP
Japan
Prior art keywords
duct
distributor
slider
valve means
hoist
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP54876798A
Other languages
Japanese (ja)
Inventor
コルニア，エンリコ，マリア
Original Assignee
ミタ オレオダイナミカ ソシエタ ペル アチオニ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ミタ オレオダイナミカ ソシエタ ペル アチオニ filed Critical ミタ オレオダイナミカ ソシエタ ペル アチオニ
Publication of JP2000514909A publication Critical patent/JP2000514909A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
    • A01B63/02—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors
    • A01B63/10—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/01—Locking-valves or other detent i.e. load-holding devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/455—Control of flow in the feed line, i.e. meter-in control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/46—Control of flow in the return line, i.e. meter-out control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/615—Filtering means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7052—Single-acting output members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y10T137/87177—With bypass
    • Y10T137/87185—Controlled by supply or exhaust valve

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
  • Agricultural Machines (AREA)

Abstract

(57)【要約】 加圧した流体のための少なくとも一つの吸込みダクト３、少なくとも一つの吐出ダクト８，２２，１１，１９ａおよびホイスト・アームを持ち上げる液圧シリンダ６に接続する少なくとも一つのダクト５を有するコンパクトな本体２を備えた、トラクタおよび農業機械用の位置および加えた力に関して制御可能な液圧ホイストのディストリビュータ。ディストリビュータの本体２内には加圧流体の流れを調整し、主内部ダクト９，９ａによって接続ダクト５と連通する弁手段７と、液圧昇降シリンダ６から来る流体を吐出する弁ユニット１２とが配置される。スライダ１６は、円筒形本体２内でニュートラル位置Ｎに対して２つの反対方向Ｃ，Ｓに移動可能で、好ましくはコンセント弁手段１９の介在により、調整弁手段７を液圧で制御する。スライダ１６は、主内部ダクト９，９ａ内に配置された吐出弁ユニットおよび可変チョーク部材１６ｃも制御する。 (57) Abstract: At least one suction duct 3 for pressurized fluid, at least one discharge duct 8, 22, 11, 19a and at least one duct 5 connected to a hydraulic cylinder 6 for lifting the hoist arm. Distributor of hydraulic hoist controllable with respect to position and applied force for tractors and agricultural machines with a compact body 2 having In the main body 2 of the distributor, a valve means 7 for regulating the flow of the pressurized fluid and communicating with the connection duct 5 by the main internal ducts 9 and 9a, and a valve unit 12 for discharging the fluid coming from the hydraulic lifting cylinder 6 are provided. Be placed. The slider 16 is movable in two opposite directions C and S with respect to the neutral position N within the cylindrical body 2, and preferably controls the regulating valve means 7 hydraulically through the outlet valve means 19. The slider 16 also controls a discharge valve unit and a variable choke member 16c arranged in the main internal ducts 9, 9a.

Description

【発明の詳細な説明】 トラクタおよび農業機械用の、位置および加えた力に関して制御可能な液圧ホイ ストのディストリビュータ 本発明は、トラクタおよび農業機械用の、位置および加えた力に関して制御可 能な液圧ホイストのディストリビュータ（分配弁）に関する。特に、このディス トリビュータはトラクタまたは農業機械に装着され、土壌の作業または準備用の 器具を接続する３点継手の動作を調整し、制御するのに用いるものである。 ３点継手用の種々の型式のホイスト、およびその動作を制御する種々の型式の ディストリビュータが知られている。既知のディストリビュータの一つが、例え ば同じ出願人に属するイタリア特許出願第MO91A000137号に記載されている。基 本的に、既知の型式のディストリビュータは、種々の弁要素が内部に配置された ほぼ円筒形でコンパクトな本体を備え、そのうち最も重要なのはスライド弁で、 そのスライダはホイスト・レバーで操作され、アクチュエータのシリンダへの加 圧流体の個々の流量を調整するか、あるいはそのアクチュエータ・シリンダから 特定の量の流体を吐出させることができる。ホイストは通常、既に他の機器の農 業機械に配置されている加圧オイル分配システムに接続される。 オイル分配システムは通常、容積式ポンプを備え、これは大抵のトラクタでは 、可変容量型よりはるかに安価なので、固定容量型である。往々にして、トラク タの補助装置に必要なオイル流は非常に多く、そのような場合、特に固定容量型 の容積式ポンプで、ホイスト・シリンダの容量が中位から少量の場合、既知の型 式のディストリビュータは、システムの過度の応答率による不安定さのため、振 動動作を呈することがある。また、ディストリビュータは、システムの強度およ び精度の両方に対して有害と証明されることがある圧力ピークを受ける。 上記の問題を解決するため、既知の解決策は必然的にディストリビュータの寸 法が大きくなるか、システムが複雑になり、接近が困難な位置に別個の弁を追加 している。 本発明の目的は、単純で経済的に生産され、設置が単純でコンパクトな形状を 有し、加える力および位置を非常に正確に調整することができる改良型ディスト リビュータによって、上記の欠点を克服することである。実際、本発明を使用す ると、制御された位置の操作で、ホイストのアームを１５０以上の異なる位置に することができる。 上記の目的を達成するため、本発明は請求項１および請求項４に示す型式のデ ィストリビュータに関する。 本発明により生産されるディストリビュータは、要求するスペースが小さいの で、ホイストに容易に設置される。また、ディストリビュータは、流れおよびア クチュエータ・シリンダに伝達する圧力の両方を制御する完全な流体回路を備え る。 本発明のさらなる利点は、上昇段階と下降段階の両方で穏やかに始動し、ゆっ くり停止することを保証するため、ディストリビュータがホイスト・アームの動 作を制御し、その結果、３点継手、したがってそれに接続された農業機具の動作 を制御するということにある。したがって、農業機械へのキックバックの危険、 およびそれによる振動が防止され、農業機械を操縦するオペレータの快適性が向 上する。 本発明のさらなる利点は、ディストリビュータの優れた機能性を簡単に保守お よび制御できることにある。 さらなる特徴および利点は、純粋に非制限的な例によって与えられた好ましい 実施形態に関する以下の記述を、添付図面類を参照しながら辿ることによって明 白になる。 図１は、本発明によるディストリビュータの縦断面図である。 図２は、本発明の弁ユニットの変形例の縦断面略図である。 次に図１を参照すると、ディストリビュータ１はコンパクトな本体２を備え、 これはほぼ円筒形であることが好ましいが、そうである必要はなく、その周囲に ポンプ４から来る加圧流体を分配する第１環状ダクト３と、単動アクチュエータ ・シリンダ６と連通する第２環状ダクト５が配置され、シリンダは一般に知られ ている型式のホイストのアームを上下させることができる。環状分配ダクト３は 、ディストリビュータの本体２の内部に配置された流量調整弁７と連通する。以 下 でさらに詳細に説明する成形スライダ１６の位置に応じて、調整弁７はポンプ４ から来る流体を吐出部８に送るか、主横断ダクト９，９ａに送り、主横断ダクト は第２環状ダクト５、したがってシリンダ６に通じて、逆止め吐出弁１０を通過 する。主横断ダクトは、スライダ１６上に配置された可変チョーク部材１６ｃに よって２つの部分９および９ａに分割される。 シリンダ６に接続する第２環状ダクト５も、吐出弁ユニット１２およびシリン ダの下降速度を制限する装置１３によって主吐出ダクト１１と連通する。特に、 図１に図示された制限装置１３は、例えばハンドル車を有するなど、外部制御装 置１４によって操作できる手動調整タイプである。制限装置１３は、言うまでも なく、シリンダ６を出て吐出部１１へと搬送される流体の速度の関数として、自 動的に調整する型式でもよい。 シリンダ６によってホイストのアームを上下する命令は、本体２から突き出す 端部ヘッド１７を設けた成形スライダ１６によって与えられる。ヘッド１７の位 置は、運転者が操作できる外部制御装置によって決定されるか、位置および加え る力を制御した操作のために既知の方法でフィードバック・システムを構成する ホイストの内部レバーのシステムの位置によって決定される。スライダ１６はニ ュートラル位置Ｎを有し、そこからシリンダ６の充填および排出、したがってホ イスト・アームの上昇および下降をそれぞれ実行するために、上方向（方向Ｃ） または下方向（方向Ｓ）に移動することができる。 特に、スライダ１６は、吐出弁ユニット１２、可変チョーク部材１６ｃおよび スライド弁１８を同時に制御し、スライド弁はコンセント弁１９を制御する。さ らに正確に述べると、コンセント弁１９は、加圧流体を二次横断ダクト２０また は吐出部１９ａに分岐させることにより、調整弁７の位置を制御する。コンセン ト弁１９の位置は、スライダ１６の位置、特に環状溝１６ａ，１６ｂの位置に応 じて主横断ダクト９または吐出部２２と連絡する上部チャンバ２１内部の流体圧 力によって決定される。 シリンダ６内の圧力を制限する弁２３がディストリビュータを完成させる。図 １の例では、ポンプの吐出圧力を制限する別の弁２４を、例えばホイストの本体 内など、ディストリビュータの外部に配置するが、その別の弁２４の制限機能を ディストリビュータ内部に統合することも可能である。例えば、図２に図示する ように、第２被制御圧力制限弁３０が流量調整弁７に付随し、したがってポンプ ４から来るオイルの最大圧力を制限する弁の機能を果たす。特に、被制御弁３０ は、固定チョーク３１によって常に環状吐出ダクト３と連絡している二次横断ダ クト２０内の圧力を感知する。二次ダクト３０内の圧力が所定の閾値を超えると 、被制御弁３０が開き、その結果、調整弁７が開いて、ポンプ４から来るオイル を吐出ダクト８へと吐出することができる。 成形スライダ１６がニュートラル位置Ｎにあると、吐出弁ユニット１２がスラ イダ１６によって閉位置に機械的に維持される一方、調整弁７が開くので、シリ ンダ６は静止し、したがってポンプ４から来る流体の流れ全体が、吐出部８へと 流れる。実際、ニュートラル位置Ｎでは、チャンバ２１は吐出モードになり、し たがってコンセント弁１９が吐出部１９ａに向かって開く。 液圧ホイストに接続された器具を上昇させる場合は、端部ヘッド１７を矢印Ｃ の方向に押し上げると、スライダ１６の動きによってコンセント弁１９の上部チ ャンバ２１内の圧力が上昇して、吐出部１９ａとの連通を閉じ、したがって二次 横断ダクト２０内の圧力が上昇し、調整弁７が吐出開口部８を閉鎖する。したが って、固定チョーク３１および可変チョーク１６ｃによって調整された加圧流体 の多少大きい流れは、逆止め弁１０の抵抗を克服し、シリンダ６に流入して、農 業機械に接続された器具を上昇させることができる。特に、可変チョーク１６ｃ によって、シリンダ６に可変流量で供給することができ、これでホイスト・アー ムの穏やかな始動および停止が確保される。ニュートラル位置Ｎからのスライダ １６の偏差が小さい場合は、可変チョーク１６ｃが非常に小さく、スライダ１６ がニュートラル位置Ｎから矢印Ｃの方向に大きく偏ると、それが広くなる。 これに対して、器具を下降させる場合は、スライダ１６が矢印Ｓの方向に移動 し、吐出弁１２を開く。器具の下降速度は弁１３によって制御され、ディストリ ビュータに構築される弁１３の種類に応じて、外部制御装置１４によって自動ま たは手動で設定される。ディストリビュータが作動状態にある場合、調整弁７お よびコンセント弁１９は、スライダ１６のニュートラル位置Ｎに関して上述した のと同じ挙動をとる。 当然、本発明の原理を同じに維持して、実施形態の形および構造の詳細を、記 述および図示のものに関して本発明の範囲から逸脱することなく大きく変更する ことができる。DETAILED DESCRIPTION OF THE INVENTION Hydraulic hoists for tractors and agricultural machines with controllable position and applied force Strike distributor   The present invention provides control over position and applied force for tractors and agricultural machinery. The present invention relates to a distributor (distribution valve) of a hydraulic hydraulic hoist. In particular, this disk The tributor is mounted on a tractor or agricultural machine for working or preparing soil. It is used to adjust and control the operation of the three-point joint connecting the instruments.   Different types of hoists for three-point joints and different types of hoists controlling their operation Distributors are known. One of the known distributors, For example, it is described in Italian Patent Application No. MO91A000137 belonging to the same applicant. Base Essentially, known types of distributors have various valve elements disposed therein. It has a nearly cylindrical and compact body, the most important of which is a slide valve, The slider is operated by a hoist lever and the actuator is applied to the cylinder. Adjust the individual flow of the pressurized fluid or from its actuator cylinder A specific amount of fluid can be discharged. Hoists are usually already farmed for other equipment. Connected to a pressurized oil distribution system located on the industrial machine.   Oil distribution systems usually include a positive displacement pump, which in most tractors Since it is much cheaper than a variable capacitance type, it is a fixed capacitance type. Often a truck The oil flow required by the auxiliary equipment of the motor is very high, in which case For positive displacement pumps with medium to small hoist cylinder capacity, Distributors may not operate due to system instability due to excessive response rates. It may exhibit a dynamic action. Distributors also determine system strength and Subject to pressure peaks that may prove to be detrimental to both accuracy and precision.   Known solutions necessarily address the size of the distributor to solve the above problem. Larger laws or more complex systems, adding separate valves where access is difficult are doing.   It is an object of the present invention to have a simple, economically produced, Improved dist to have very precise adjustment of applied force and position With a writer, the above disadvantages are overcome. In fact, using the present invention Then, the operation of the controlled position moves the hoist arm to more than 150 different positions. can do.   In order to achieve the above object, the present invention provides a device of the type shown in claims 1 and 4. Related to distributors.   Distributors produced according to the invention require less space. And is easily installed on the hoist. Distributors also need to Includes a complete fluid circuit that controls both the pressure transmitted to the actuator cylinder You.   A further advantage of the present invention is that it starts gently in both the up and down phases, Distributor must move hoist arm to ensure Control the operation and, consequently, the operation of the three-point joint and thus the agricultural implement connected to it. That is to control. Therefore, the danger of kickback on agricultural machinery, And the resulting vibrations are prevented, improving the comfort of operators operating agricultural machinery. Up.   A further advantage of the present invention is that the superior functionality of the distributor is easily maintained and maintained. And control.   Further features and advantages are given by purely non-limiting examples The following description of the embodiments will be made clear by referring to the attached drawings. It turns white.   FIG. 1 is a longitudinal sectional view of a distributor according to the present invention.   FIG. 2 is a schematic longitudinal sectional view of a modified example of the valve unit of the present invention.   Referring now to FIG. 1, the distributor 1 comprises a compact body 2, This is preferably substantially cylindrical, but need not be, and around it A first annular duct 3 for distributing the pressurized fluid coming from the pump 4 and a single-acting actuator A second annular duct 5 communicating with the cylinder 6 is arranged, the cylinder being generally known The hoist arm of this type can be raised and lowered. The annular distribution duct 3 And a flow control valve 7 arranged inside the main body 2 of the distributor. Less than under In accordance with the position of the forming slider 16 which will be described in more detail in From the main crossing duct 9, 9a or to the main crossing duct 9, 9a Passes through the second annular duct 5 and thus through the cylinder 6 and through the check discharge valve 10 I do. The main crossing duct is connected to a variable choke member 16c disposed on the slider 16. Thus, it is divided into two parts 9 and 9a.   The second annular duct 5 connected to the cylinder 6 is also provided with the discharge valve unit 12 and the cylinder. It communicates with the main discharge duct 11 by means of a device 13 for limiting the descent speed of the duct. In particular, The limiting device 13 shown in FIG. 1 has an external control device such as a steering wheel. It is a manual adjustment type that can be operated by the device 14. The limiting device 13 is, of course, Instead, as a function of the velocity of the fluid conveyed out of the cylinder 6 to the discharge section 11, A type that adjusts dynamically may be used.   The command to raise and lower the hoist arm by the cylinder 6 protrudes from the body 2 Provided by a molded slider 16 provided with an end head 17. Head 17 place The position is determined by an external control which can be operated by the driver, or the position and additional A feedback system in a known way for force-controlled operation Determined by the position of the hoist internal lever system. Slider 16 A neutral position N from which the charging and discharging of the cylinder 6 and thus the Upward (direction C) to carry out raising and lowering of the ist arm, respectively Alternatively, it can move downward (direction S).   In particular, the slider 16 includes the discharge valve unit 12, the variable choke member 16c, The slide valve 18 is controlled simultaneously, and the slide valve controls the outlet valve 19. Sa More precisely, outlet valve 19 directs pressurized fluid to secondary transverse duct 20 or Controls the position of the regulating valve 7 by branching to the discharge section 19a. Consensus The position of the valve 19 depends on the position of the slider 16, particularly the positions of the annular grooves 16a and 16b. Fluid pressure inside the upper chamber 21 communicating with the main transverse duct 9 or the discharge part 22 Determined by force.   A valve 23 which limits the pressure in the cylinder 6 completes the distributor. Figure In one example, another valve 24 that limits the discharge pressure of the pump is provided, for example, by the body of a hoist. It is located outside the distributor, such as inside, but has another valve 24 restriction function. It is also possible to integrate inside the distributor. For example, illustrated in FIG. As such, the second controlled pressure limiting valve 30 is associated with the flow regulating valve 7 and thus the pump 4 acts as a valve to limit the maximum pressure of the oil coming from. In particular, the controlled valve 30 Is a secondary transverse duct which is always in communication with the annular discharge duct 3 by a fixed choke 31. The pressure in the connector 20 is sensed. When the pressure in the secondary duct 30 exceeds a predetermined threshold , The controlled valve 30 opens, and as a result, the regulating valve 7 opens, and the oil coming from the pump 4 Can be discharged to the discharge duct 8.   When the forming slider 16 is at the neutral position N, the discharge valve unit 12 While the adjustment valve 7 is opened while being mechanically maintained in the closed position by the The pump 6 is stationary, so that the entire flow of fluid coming from the pump 4 is Flows. In fact, in the neutral position N, the chamber 21 is in the discharge mode, Accordingly, the outlet valve 19 opens toward the discharge portion 19a.   To raise the instrument connected to the hydraulic hoist, the end head 17 is moved in the direction of arrow C. , The movement of the slider 16 causes the upper channel of the outlet valve 19 to move. The pressure in the chamber 21 rises, closing the communication with the discharge portion 19a, and The pressure in the transverse duct 20 increases and the regulating valve 7 closes the discharge opening 8. But Thus, the pressurized fluid adjusted by the fixed choke 31 and the variable choke 16c The somewhat large flow overcomes the resistance of the check valve 10 and flows into the cylinder 6, The equipment connected to the industrial machine can be raised. In particular, the variable choke 16c With this, a variable flow rate can be supplied to the cylinder 6 and the hoist A gentle start and stop of the system is ensured. Slider from neutral position N When the deviation of the slider 16 is small, the variable choke 16c is very small. Greatly deviates from the neutral position N in the direction of the arrow C, it becomes wider.   On the other hand, when lowering the instrument, the slider 16 moves in the direction of the arrow S. Then, the discharge valve 12 is opened. The lowering speed of the instrument is controlled by the valve 13 and According to the type of the valve 13 constructed in the viewer, the automatic control is performed by the external control device 14. Or manually set. When the distributor is in operation, the regulating valve 7 and And outlet valve 19 are described above with respect to neutral position N of slider 16. Takes the same behavior as   Of course, while maintaining the same principles of the invention, details of the form and structure of the embodiments will be described. Significant changes may be made in the description and illustration without departing from the scope of the invention. be able to.

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Claims (1)

【特許請求の範囲】 １．加圧した流体のための少なくとも一つの吸込みダクト（３）、少なくとも 一つの吐出ダクト（８，２２，１１，１９ａ）およびホイスト・アームを持ち上 げる液圧シリンダ（６）に接続する少なくとも一つのダクト（５）を有するコン パクトな本体（２）を備え、本体（２）内には加圧流体の流れを調整する弁手段 （７）が配置され、スライダ（１６）が円筒形本体（２）内でニュートラル位置 （Ｎ）に対して２つの反対方向（Ｃ，Ｓ）に移動可能な、トラクタおよび農業機 械用の位置および加えた力に関して制御可能な液圧ホイストのディストリビュー タであって、スライダ（１６）が、コンセント弁手段（１９）の介在によって調 整弁手段（７）を液圧で制御することを特徴とするディストリビュータ。 ２．コンセント弁手段（１９）は、スライダ（１６）がニュートラル位置（Ｎ ）から移動した後に、少なくとも一つの吸込みダクト（３，９）または吐出ダク ト（１９ａ）と選択的に連通するよう配置された制御チャンバ（２１）を備える ことを特徴とする、請求項１に記載のディストリビュータ。 ３．スライダ（１６）がニュートラル位置（Ｎ）にある場合に、制御チャンバ （２１）が吐出モードにあることを特徴とする、請求項２に記載のディストリビ ュータ。 ４．加圧した流体のための少なくとも一つの吸込みダクト（３）、少なくとも 一つの吐出ダクト（８，２２，１１，１９ａ）およびホイスト・アームを持ち上 げる液圧シリンダ（６）に接続する少なくとも一つのダクト（５）を有するコン パクトな本体（２）を備え、本体（２）内には加圧流体の流れを調整して、主内 部ダクト（９，９ａ）によって接続ダクト（５）と連絡する弁手段（７）と、液 圧昇降シリンダ（６）から来る流体を吐出する弁ユニット（１２）とが配置され 、スライダ（１６）が円筒形本体（２）内でニュートラル位置（Ｎ）に対して２ つの反対方向（Ｃ，Ｓ）に移動可能な、トラクタおよび農業機械用の位置および 加えた力に関して制御可能な液圧ホイストのディストリビュータであって、スラ イダ（１６）が同時に −吐出弁ユニット（１２）と、 −調整弁手段（７）と、 −主内部ダクト（９，９ａ）内の可変チョーク部材とを制御することを特徴とす るディストリビュータ。 ５．可変チョーク部材（１６ｃ）がスライダ（１６）上に直接配置されること を特徴とする、請求項４に記載のディストリビュータ。 ６．スライダ（１６）が、コンセント弁手段（１９）の介在で調整弁手段（７ ）を液圧で制御することを特徴とする、請求項４に記載のディストリビュータ。 ７．スライダ（１６）が機械的方法で吐出弁ユニット（１２）を直接制御する ことを特徴とする、請求項１から６のいずれか１項に記載のディストリビュータ 。 ８．本体（２）内に、調整弁手段（７）と相互作用してポンプ（４）の吐出圧 力を制御する被制御弁手段（３）が配置されることを特徴とする、請求項１から ７のいずれか１項に記載のディストリビュータ。 ９．トラクタおよび農業機械用の位置および加えた力に関して制御可能な液圧 ホイストであって、請求項１から８のいずれか１項に記載のディストリビュータ を備えることを特徴とする液圧ホイスト。 １０．被制御位置操作において、１５０を超えるホイスト・アームの異なる位 置が獲得できることを特徴とする、請求項９に記載の液圧ホイスト。[Claims]   1. At least one suction duct for pressurized fluid (3), at least Lift one discharge duct (8,22,11,19a) and hoist arm Having at least one duct (5) connected to a hydraulic cylinder (6) Valve means for regulating the flow of pressurized fluid within the body (2), comprising a compact body (2) (7) is located and the slider (16) is in neutral position within the cylindrical body (2). Tractor and agricultural machine movable in two opposite directions (C, S) with respect to (N) Hydraulic hoist distribution controllable with respect to machine position and applied force The slider (16) is adjusted by the interposition of the outlet valve means (19). A distributor characterized in that the valve regulating means (7) is controlled by hydraulic pressure.   2. In the outlet valve means (19), when the slider (16) is in the neutral position (N ), At least one suction duct (3, 9) or discharge duct And a control chamber (21) arranged to selectively communicate with the control chamber (19a). The distributor of claim 1, wherein:   3. When the slider (16) is in the neutral position (N), the control chamber The distributor according to claim 2, wherein (21) is in a discharge mode. Computer.   4. At least one suction duct for pressurized fluid (3), at least Lift one discharge duct (8,22,11,19a) and hoist arm Having at least one duct (5) connected to a hydraulic cylinder (6) It has a compact main body (2) and adjusts the flow of pressurized fluid in the main body (2) to Valve means (7) communicating with the connection duct (5) by means of the partial ducts (9, 9a); A valve unit (12) for discharging a fluid coming from the pressure raising / lowering cylinder (6). , The slider (16) is located at 2 relative to the neutral position (N) in the cylindrical body (2). Positions for tractors and agricultural machines movable in two opposite directions (C, S) and A hydraulic hoist distributor that can control the applied force, Ida (16) at the same time A discharge valve unit (12); Regulating valve means (7); Controlling the variable choke member in the main internal duct (9, 9a); Distributor.   5. The variable choke member (16c) is arranged directly on the slider (16) The distributor according to claim 4, characterized in that:   6. The slider (16) is provided with the adjusting valve means (7) through the outlet valve means (19). 5. The distributor according to claim 4, wherein the pressure is controlled by hydraulic pressure.   7. Slider (16) directly controls discharge valve unit (12) in a mechanical manner The distributor according to any one of claims 1 to 6, characterized in that: .   8. In the body (2), the discharge pressure of the pump (4) interacts with the regulating valve means (7). 2. The arrangement according to claim 1, wherein a controlled valve means for controlling the force is arranged. 8. The distributor according to any one of 7.   9. Controllable hydraulic pressure with respect to position and applied force for tractors and agricultural machines 9. A distributor according to any one of the preceding claims, being a hoist. A hydraulic hoist comprising:   10. More than 150 different positions of the hoist arm in controlled position operation 10. The hydraulic hoist according to claim 9, wherein the position can be obtained.
JP54876798A 1997-05-13 1998-05-07 Hydraulic hoist distributor with controllable position and applied force for tractors and agricultural machinery Pending JP2000514909A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT97BO000289 IT1292919B1 (en) 1997-05-13 1997-05-13 DISTRIBUTOR FOR A CONTROLLED POSITION AND EFFORT HYDRAULIC LIFT FOR TRACTORS AND AGRICULTURAL MACHINES.
IT97A000289 1997-05-13
PCT/EP1998/002694 WO1998051932A1 (en) 1997-05-13 1998-05-07 Distributor for a hydraulic hoist which is controllable with regard to position and applied force, for tractors and agricultural machines

Publications (1)

Publication Number Publication Date
JP2000514909A true JP2000514909A (en) 2000-11-07

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JP54876798A Pending JP2000514909A (en) 1997-05-13 1998-05-07 Hydraulic hoist distributor with controllable position and applied force for tractors and agricultural machinery

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US (1) US6105613A (en)
EP (1) EP0910748B1 (en)
JP (1) JP2000514909A (en)
KR (1) KR100342109B1 (en)
AT (1) ATE257550T1 (en)
AU (1) AU7653198A (en)
DE (1) DE69820956T2 (en)
ES (1) ES2212298T3 (en)
IT (1) IT1292919B1 (en)
TR (1) TR199900069T1 (en)
WO (1) WO1998051932A1 (en)

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CN101990797A (en) * 2010-09-01 2011-03-30 中国一拖集团有限公司 Combined hydraulic fluid distributor for tractor
CN106151141B (en) * 2016-07-07 2017-10-17 第一拖拉机股份有限公司 A kind of tractor distributor
CN106015146B (en) * 2016-07-18 2018-09-25 山东弘宇农机股份有限公司 A kind of built-in pressure distributor
TR201708846A2 (en) * 2017-06-15 2017-09-21 Hema Enduestri Anonim Sirketi A CONTROL VALVE FOR HYDRAULIC LIFTS
IT202000002977A1 (en) * 2020-02-14 2021-08-14 Negri Srl HYDRAULIC CONTROL CIRCUIT FOR AN OPERATING MACHINE AND RELATED OPERATING MACHINE
CN113446281B (en) * 2021-07-22 2022-07-15 山东弘宇农机股份有限公司 A lifter distributor for a tractor

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Also Published As

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AU7653198A (en) 1998-12-08
EP0910748B1 (en) 2004-01-07
DE69820956T2 (en) 2004-12-23
KR20000023734A (en) 2000-04-25
EP0910748A1 (en) 1999-04-28
ITBO970289A1 (en) 1998-11-13
US6105613A (en) 2000-08-22
KR100342109B1 (en) 2002-06-26
IT1292919B1 (en) 1999-02-11
WO1998051932A1 (en) 1998-11-19
ES2212298T3 (en) 2004-07-16
DE69820956D1 (en) 2004-02-12
ITBO970289A0 (en) 1997-05-13
ATE257550T1 (en) 2004-01-15
TR199900069T1 (en) 1999-08-23

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